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The two processes of the carbon cycle are photosynthesis and cellular respiration. In photosynthesis carbon from carbon dioxide is fixed into carbohydrates. In cellular respiration, carbohydrates are broken down to form ATP and carbon in the form of carbon dioxide is released into the atmosphere.
The three cycles that move through the ecosystem are the water cycle, carbon cycle, and nitrogen cycle. These cycles play crucial roles in maintaining the balance of nutrients and resources within the ecosystem, ensuring the survival of organisms and the functioning of ecosystems.
True. The main carbon cycle involves the conversion of carbon dioxide into living matter through photosynthesis by plants, which is then released back into the atmosphere as carbon dioxide through respiration and decomposition processes.
The non-examples of the carbon cycle are animals and energy.
Carbon enters the carbon cycle through various processes such as photosynthesis by plants and algae, respiration by living organisms, volcanic eruptions releasing CO2, and the decay of organic matter by decomposers. Human activities such as burning fossil fuels and deforestation also contribute to the carbon cycle.
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One path a carbon molecule can take through the carbon cycle is through photosynthesis. In this process, plants absorb carbon dioxide from the atmosphere and convert it into glucose, a form of stored energy. When animals consume these plants, the carbon is transferred into their bodies. Eventually, through respiration or decomposition, the carbon is released back into the atmosphere as carbon dioxide, continuing the cycle.
During the Calvin cycle, 6 molecules of carbon dioxide (CO2) are needed to produce one molecule of glucose because glucose contains 6 carbon atoms. Each carbon dioxide molecule contributes one carbon atom to the glucose molecule through a series of chemical reactions in the Calvin cycle.
In the Calvin Cycle, the molecule that is reduced is carbon dioxide (CO2).
The two-carbon molecule that combines with a four-carbon molecule in the citric acid cycle to produce citric acid is acetyl-CoA. Acetyl-CoA condenses with oxaloacetate (a four-carbon molecule) to form citrate, the first step in the citric acid cycle.
In cellular respiration, a two-carbon molecule (acetyl-CoA) combines with a four-carbon molecule (oxaloacetate) to form citric acid in the first step of the citric acid cycle (Krebs cycle). This process occurs in the mitochondria and is essential for the production of ATP through the oxidation of acetyl-CoA.
The net gain of carbon atoms in the Krebs cycle is zero. Although acetyl-CoA enters the cycle as a 2-carbon molecule, it ultimately combines with oxaloacetate (a 4-carbon molecule) to form citrate (a 6-carbon molecule), which is then oxidized back to oxaloacetate. This means that the total number of carbon atoms remains constant throughout the cycle.
Carbon 1 and Carbon 4 in glucose molecule are released as CO2 in the TCA cycle.
Carbon dioxide
The molecule used to replenish RuBP in the Calvin Cycle is phosphoglycerate (PGA). PGA is converted to RuBP through a series of enzymatic reactions, allowing the cycle to continue and fix more carbon dioxide.
Carbon dioxide is the molecule from the air that is broken down during the Calvin cycle in photosynthesis to produce glucose.
is the biogeochemical cycle in which carbon cycles through earth's ecosystems.